Grace is a beautiful virtue, clothing it's owner in splendour.
The dictionary says..."it is a disposition to or an act or instance of kindness, courtesy, or clemency." A synonym is mercy.
Also another dictionary states gracious as "characterized by charm, good taste, generosity of spirit, and the tasteful leisure of wealth and good breeding <gracious living>"
Thus it can be seen that for a person to own grace as one of his virtues, intrinsically, he would behave in a generous manner, making allowances for and or acting kindly toward others, showing mercy, should it be called for.
"Happy are the merciful, since they will be shown mercy" is a well known scripture. Grace begets grace is another way of putting it. Your acts are imitated by others. Is that not encouraging, to think that you could be responsible for a moral contagion?
An act of courtesy when in traffic may not always be described as an act of grace, but a person who wishes to be gracious or is gracious would think nothing of doing so out of his breeding. Is that not a wondeful description of a man or woman, "A person of breeding" and it should hastily be added that this is not connected to how wealthy a person is.
Breeding aptly explains how it happens that a person has grace. It is not a fluke.
The character of a graceful person is an excellent reflection on his parents. They did a good job rearing this child.
One wonders exactly how his or her parents achieved this wondeful result?
It is no mystery...